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amyanger 7436ac8e20 fix(javascript): drop built-in effects for visibly replaced globals (#4565)
The semantic collectors admitted Node timers, fetch, WebSocket, JSON.parse
and global coercions from the identifier spelling alone, so a source that
replaced those globals (`setTimeout = () => null`) still produced resolved
built-in effects. Require the existing isUnmodifiedGlobalReference guard,
which the static analyzer already uses for fetch and WebSocket, before
admitting these effects.

The guard treats any visible possible write as a replacement without
evaluating order or reachability, so computed global writes and guarded
polyfills also remove the resolved effect. The workflow docs now say so.

Fixes #3367
2026-10-23 02:28:53 +08:00
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